The heart of the system is a diode pumped solid state (DPSS) master oscillator placed in a sealed monolithic block, producing high repetition rate pulse trains (88 mHz) with a low single pulse energy of several nJ. Diode pumped ampliiers are used for ampliication of the pulse to 40 mJ output. The high-gain regenerative ampliier has an ampliication factor in the proximity of 10⁶. After the regenerative ampliier, the pulse is directed to a multipass power ampliier that is optimized for eficient stored energy extraction from the Nd:YAG rod, while maintaining a near Gaussian beam proile and low wavefront distortion.

The output pulse energy can be adjusted in approximately 1% steps, while pulse-to-pulse energy stability remains at less than 0.5% rms at 1064 nm. Angle-tuned KD*P and KDP crystals mounted in thermostabilised ovens are used for second, third, and fourth harmonic generation. Harmonics separators ensure the high spectral purity of each harmonic guided to different output ports. Built-in energy monitors continuously monitor output pulse energy. data from the energy monitor can be seen on the remote keypad or on a Pc monitor. The laser provides triggering pulses for the synchronisation of your equipment. The lead of the triggering pulse can be up to 500 ns and is user adjustable in ~0.25 ns steps from a personal computer. if required, up to 1000 μs lead of triggering pulse is available when a PRETRIG option is installed. Precise pulse energy control, excellent short-term and long-term stability, and a 50 Hz repetition rate makes PL2230 series lasers an excellent choice for many demanding scientiic applications.

Simple and convenient laser control

For customer convenience the laser can be controlled through a user‑friendly remote control pad or USB interface.

The remote pad allows easy control of all parameters and features a back‑lit display that is easy to read even with laser safety eye-wear. Alternatively, the laser can be controlled from a personal computer with supplied software for a Windows™ operating system. LabView™ drivers are supplied as well.

Tab 2

Specifications 1)

Model

PL2231-50

Pulse energy

at 1064 nm

40 mJ

at 532 nm2)

18 mJ

at 355 nm3)

12 mJ

at 266 nm4)

5 mJ

at 213 nm5)

2 mJ

Pulse energy stability (Std. Dev) 6)

at 1064 nm

< 0.5 %

at 532 nm

< 0.8 %

at 355 nm

< 1.1 %

at 266 nm

< 1.2 %

at 213 nm

< 2.5 %

Pulse duration (FWHM) 7)

28±10 %

Pulse duration stability 8)

± 1.0 %

Max pulse repetition rate 9) 10)

50 Hz

Polarization

linear, vertical, > 100:1

Pre-pulse contrast

> 200:1

Triggering mode

internal/external

SYNC OUT pulse jitter 11)

< 0.1 ns

SYNC OUT pulse delay 12)

-500...50 ns

Beam divergence 13)

< 0.7 mrad

Beam pointing stability 14)

< 15 µrad

Beam diameter 15)

~6 mm

Typical warm-up time

10 min

Physical characteristics

Laser head size (W x L x H)

456 x 1031 x 249 mm

Electric cabinet size (W x L x H)

471 x 391 x 147 mm

Umbilical length

2.5 m

Operating requirements

Cooling 16)

built-in chiller

Room temperature

22±2 °C

Relative humidity (non-condensing)

20-80 %

Power requirements

110-240 V AC, 50/60 Hz

Power consumption

< 0.5 kVA

1) Due to continuous improvement, all speciications are subject to change without notice. For latest product information please visit EKSPLA. The parameters marked typical are not speciications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise all speciications are measured at 1064 nm.

2) For -SH option. Outputs are not simultaneous. Please inquire for pulse energies at other wavelengths.

3) For -TH option. Outputs are not simultaneous. Please inquire for pulse energies at other wavelengths.

4) For -FH option. Outputs are not simultaneous. Please inquire for pulse energies at other wavelengths.

5) For -FiH option. Outputs are not simultaneous. please inquiry for pulse energies at other wavelengths. FiH option is supplied in separate harmonics unit.

6) Averaged from pulses, emitted during 30 sec time interval.

7) Inquire for optional pulse durations in 20 – 100 ps range.

8) Measured over 1 hour period when ambient temperature variation is less than ±1 °C.